[ 30.265358] BUG: Bad rss-counter state mm:00000000f4349910 type:MM_FILEPAGES val:33 [ 30.266052] BUG: Bad rss-counter state mm:00000000f4349910 type:MM_ANONPAGES val:22 [ 30.465570] ================================================================== [ 30.466168] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.466782] Read of size 8 at addr ffff88800dd4e5c8 by task sshd/221 [ 30.467287] [ 30.467428] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.468941] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.469580] Call Trace: [ 30.469902] [ 30.470097] dump_stack_lvl+0x91/0xf0 [ 30.470431] print_report+0xcc/0x620 [ 30.470772] ? __virt_addr_valid+0x102/0x340 [ 30.471142] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.471556] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.471994] kasan_report+0xbe/0xf0 [ 30.472565] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.473000] vma_interval_tree_remove+0xc75/0xec0 [ 30.473411] vma_prepare+0xc54/0x11a0 [ 30.473737] __split_vma+0x5af/0x950 [ 30.474061] ? __pfx___split_vma+0x10/0x10 [ 30.474420] ? find_held_lock+0x2c/0x110 [ 30.474775] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.475152] ? lock_is_held_type+0x9f/0x120 [ 30.475501] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.476210] ? mtree_range_walk+0x632/0x900 [ 30.476589] ? mas_walk+0x5c7/0x7c0 [ 30.476926] do_vmi_munmap+0x1f1/0x2b0 [ 30.477264] mmap_region+0x1f9/0x2660 [ 30.477592] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.477939] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.478409] ? __pfx_lock_acquire+0x10/0x10 [ 30.478768] ? __pfx_mmap_region+0x10/0x10 [ 30.479134] ? security_mmap_addr+0x7d/0xa0 [ 30.479497] ? get_unmapped_area+0x1f5/0x3f0 [ 30.480132] do_mmap+0x854/0xf00 [ 30.480437] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.480847] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.481236] ksys_mmap_pgoff+0x3af/0x500 [ 30.481574] do_syscall_64+0x3f/0x90 [ 30.482002] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.482442] RIP: 0033:0x7f04b16bcd82 [ 30.482763] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 30.484208] RSP: 002b:00007fffc6104b38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.484812] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f04b16bcd82 [ 30.485364] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f04b0af6000 [ 30.485929] RBP: 00007f04b0af6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.486495] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558c497ecec0 [ 30.487062] R13: 00007fffc6104b50 R14: 00007fffc6104b80 R15: 00007fffc6104ee0 [ 30.487646] [ 30.488135] [ 30.488284] Allocated by task 212: [ 30.488564] kasan_save_stack+0x22/0x50 [ 30.488981] kasan_set_track+0x25/0x30 [ 30.489319] __kasan_slab_alloc+0x59/0x70 [ 30.489777] kmem_cache_alloc+0x16b/0x370 [ 30.490127] vm_area_dup+0x20/0x160 [ 30.490435] __split_vma+0x170/0x950 [ 30.490763] split_vma+0xc6/0x110 [ 30.491060] mprotect_fixup+0x8d2/0xb30 [ 30.491411] do_mprotect_pkey+0x87e/0xd40 [ 30.491757] __x64_sys_mprotect+0x78/0xc0 [ 30.492145] do_syscall_64+0x3f/0x90 [ 30.492468] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.492900] [ 30.493047] Freed by task 212: [ 30.493313] kasan_save_stack+0x22/0x50 [ 30.493654] kasan_set_track+0x25/0x30 [ 30.493988] kasan_save_free_info+0x2b/0x50 [ 30.494346] __kasan_slab_free+0x10a/0x190 [ 30.494708] kmem_cache_free+0x10d/0x4d0 [ 30.495042] rcu_core+0x8c8/0x2860 [ 30.495349] __do_softirq+0x1b7/0x7d4 [ 30.495676] [ 30.496129] Last potentially related work creation: [ 30.496520] kasan_save_stack+0x22/0x50 [ 30.496873] __kasan_record_aux_stack+0x8e/0xa0 [ 30.497261] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.497695] remove_vma+0x139/0x170 [ 30.498004] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.498373] do_vmi_munmap+0x1f1/0x2b0 [ 30.498703] __vm_munmap+0x138/0x3a0 [ 30.499021] __x64_sys_munmap+0x59/0x80 [ 30.499367] do_syscall_64+0x3f/0x90 [ 30.499695] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.501255] [ 30.501400] Second to last potentially related work creation: [ 30.501865] kasan_save_stack+0x22/0x50 [ 30.502207] __kasan_record_aux_stack+0x8e/0xa0 [ 30.502593] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.503027] remove_vma+0x139/0x170 [ 30.503326] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.503701] do_vmi_munmap+0x1f1/0x2b0 [ 30.504064] __vm_munmap+0x138/0x3a0 [ 30.504382] __x64_sys_munmap+0x59/0x80 [ 30.504715] do_syscall_64+0x3f/0x90 [ 30.505039] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.505476] [ 30.505624] The buggy address belongs to the object at ffff88800dd4e570 [ 30.505624] which belongs to the cache vm_area_struct of size 168 [ 30.506608] The buggy address is located 88 bytes inside of [ 30.506608] freed 168-byte region [ffff88800dd4e570, ffff88800dd4e618) [ 30.507551] [ 30.507696] The buggy address belongs to the physical page: [ 30.508316] page:000000009620bbc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd4e [ 30.509056] memcg:ffff88800e031901 [ 30.509350] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.509818] page_type: 0xffffffff() [ 30.510123] raw: 0100000000000200 ffff8880087a0c80 ffffea000038ad40 dead000000000003 [ 30.510730] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e031901 [ 30.511329] page dumped because: kasan: bad access detected [ 30.511768] [ 30.512050] Memory state around the buggy address: [ 30.512436] ffff88800dd4e480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.513015] ffff88800dd4e500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.513591] >ffff88800dd4e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.514159] ^ [ 30.514610] ffff88800dd4e600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 30.515183] ffff88800dd4e680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.515745] ================================================================== [ 30.516939] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.468091] BUG: Bad rss-counter state mm:00000000e7281d43 type:MM_FILEPAGES val:33 [ 33.468769] BUG: Bad rss-counter state mm:00000000e7281d43 type:MM_ANONPAGES val:22 [ 34.303936] BUG: Bad rss-counter state mm:0000000081ec349a type:MM_FILEPAGES val:33 [ 34.308594] BUG: Bad rss-counter state mm:0000000081ec349a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1516' (ECDSA) to the list of known hosts. 2023/06/21 08:06:04 fuzzer started 2023/06/21 08:06:04 dialing manager at localhost:36067 2023/06/21 08:06:04 checking machine... 2023/06/21 08:06:04 checking revisions... [ 35.243948] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:06:04 testing simple program... [ 35.284698] cgroup: Unknown subsys name 'net' [ 35.372705] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:06:04 Registers: info registers vcpu 0 RAX=ffffffff81888655 RBX=ffffffff85e0716c RCX=ffffffff818886e2 RDX=0000000000000000 RSI=ffffffff86146872 RDI=ffffffff85e07160 RBP=ffffffff85e07160 RSP=ffff888015967710 R8 =ffffffff86146872 R9 =ffff888015967808 R10=0000000000038001 R11=00000000000231e7 R12=ffffffff85e07178 R13=ffffffff85e07160 R14=ffffffff85e07160 R15=dffffc0000000000 RIP=ffffffff8112fc99 RFL=00000216 [----AP-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc01eada900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fc01ef0a790 CR3=000000000c9ba000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=0000000000000000fffffffe7ffbfeff XMM01=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000020000000000000000 XMM04=00000000000000008000000000000006 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080010002 RBX=ffff88800f1de800 RCX=ffffffff844dad93 RDX=ffff888008d951c0 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf2c250 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=ffff88806cf09ff8 R12=dffffc0000000000 R13=00000007f825d500 R14=0000000000000001 R15=ffff88800f1de810 RIP=ffffffff814c0860 RFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fa1cd163d80 CR3=000000000d694000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=18251e5bf332e6770000000000133c78 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=d80f1dce528ef3ff00000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000